The first motorcycle-specific magnetic compass that can be calibrated while mounted on your bike (using compensation screws on the side of the unit). This makes it much more accurate on every heading. Proximity to metal gives most smaller compasses a terrible fit, but not this one. And the other compensation-adjustable compasses are much larger. With this you can become lost in much more interesting places, no matter what direction you may be riding. Mounting bracket included. 1.65"×1.5".